diff --git a/lower-constraints.txt b/lower-constraints.txt
index 52ed44bc0a..cbce5ed2e7 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -4,11 +4,11 @@ amqp==2.2.2
 appdirs==1.4.3
 asn1crypto==0.24.0
 astroid==1.3.8
-Babel==2.5.3
-bandit==1.4.0
+Babel==2.3.4
+bandit==1.1.0
 beautifulsoup4==4.6.0
 cachetools==2.0.1
-cassandra-driver==3.13.0
+cassandra-driver==2.1.4
 certifi==2018.1.18
 cffi==1.11.5
 chardet==3.0.4
@@ -16,19 +16,20 @@ cliff==2.11.0
 cmd2==0.8.1
 colorama==0.3.9
 contextlib2==0.5.5
-CouchDB==1.2
-coverage==4.5.1
+CouchDB==0.8
+coverage==4.0
 cryptography==2.1.4
 debtcollector==1.19.0
 decorator==4.2.1
 deprecation==2.0
-diskimage-builder==2.11.0
-doc8==0.8.0
+diskimage-builder==1.1.2
+doc8==0.6.0
 docutils==0.14
 dogpile.cache==0.6.5
 dulwich==0.19.0
+enum34===1.0.4
 enum-compat==0.0.2
-eventlet==0.20.0
+eventlet==0.18.2
 extras==1.0.0
 fasteners==0.14.1
 fixtures==3.0.0
@@ -39,21 +40,21 @@ gitdb2==2.0.3
 GitPython==2.1.8
 greenlet==0.4.13
 hacking==0.12.0
-httplib2==0.10.3
+httplib2==0.9.1
 idna==2.6
 imagesize==1.0.0
-iso8601==0.1.12
+iso8601==0.1.11
 Jinja2==2.10
 jmespath==0.9.3
 jsonpatch==1.21
 jsonpointer==2.0
 jsonschema==2.6.0
 keystoneauth1==3.4.0
-keystonemiddleware==4.21.0
+keystonemiddleware==4.17.0
 kombu==4.1.0
 linecache2==1.0.0
 logilab-common==1.4.1
-lxml==4.1.1
+lxml==3.4.1
 Mako==1.0.7
 MarkupSafe==1.0
 mccabe==0.4.0
@@ -62,15 +63,15 @@ monotonic==1.4
 mox3==0.25.0
 msgpack==0.5.6
 munch==2.2.0
-netaddr==0.7.19
+netaddr==0.7.18
 netifaces==0.10.6
 networkx==1.11
 nose==1.3.7
-nosexcover==1.0.11
-openstack.nose-plugin==0.11
-openstackdocstheme==1.20.0
+nosexcover==1.0.10
+openstack.nose-plugin==0.7
+openstackdocstheme==1.18.1
 openstacksdk==0.12.0
-os-api-ref==1.5.0
+os-api-ref==1.4.0
 os-client-config==1.29.0
 os-service-types==1.2.0
 os-testr==1.0.0
@@ -78,85 +79,85 @@ osc-lib==1.10.0
 oslo.cache==1.29.0
 oslo.concurrency==3.26.0
 oslo.config==5.2.0
-oslo.context==2.20.0
-oslo.db==4.35.0
-oslo.i18n==3.20.0
-oslo.log==3.37.0
-oslo.messaging==5.36.0
-oslo.middleware==3.35.0
-oslo.policy==1.34.0
-oslo.serialization==2.25.0
-oslo.service==1.30.0
-oslo.utils==3.36.0
-osprofiler==2.0.0
+oslo.context==2.19.2
+oslo.db==4.27.0
+oslo.i18n==3.15.3
+oslo.log==3.36.0
+oslo.messaging==5.29.0
+oslo.middleware==3.31.0
+oslo.policy==1.30.0
+oslo.serialization==2.18.0
+oslo.service==1.24.0
+oslo.utils==3.33.0
+osprofiler==1.4.0
 packaging==17.1
-passlib==1.7.1
-Paste==2.0.3
-PasteDeploy==1.5.2
-pbr==3.1.1
+passlib==1.7.0
+Paste==2.0.2
+PasteDeploy==1.5.0
+pbr==2.0.0
 pep8==1.7.1
-pexpect==4.4.0
-pika==0.10.0
+pexpect==3.1
 pika-pool==0.1.3
+pika==0.10.0
 prettytable==0.7.2
-proboscis==1.2.6.0
-psycopg2==2.7.4
+proboscis==1.2.5.3
+psycopg2==2.6.2
 ptyprocess==0.5.2
 pycadf==2.7.0
 pycparser==2.18
-pycrypto==2.6.1
+pycrypto==2.6
 pyflakes==1.0.0
 Pygments==2.2.0
 pyinotify==0.9.6
 pylint==1.4.5
-pymongo==3.6.1
-PyMySQL==0.8.0
+pymongo==3.0.2
+PyMySQL==0.7.6
 pyOpenSSL==17.5.0
 pyparsing==2.2.0
 pyperclip==1.6.0
-python-cinderclient==3.5.0
+python-cinderclient==3.3.0
 python-dateutil==2.7.0
-python-designateclient==2.9.0
+python-designateclient==2.7.0
 python-editor==1.0.3
-python-glanceclient==2.9.1
-python-heatclient==1.14.0
-python-keystoneclient==3.15.0
+python-glanceclient==2.8.0
+python-heatclient==1.10.0
+python-keystoneclient==3.8.0
 python-mimeparse==1.6.0
 python-mistralclient==3.3.0
 python-neutronclient==6.7.0
-python-novaclient==10.1.0
+python-novaclient==9.1.0
 python-subunit==1.2.0
-python-swiftclient==3.5.0
-python-troveclient==2.14.0
+python-swiftclient==3.2.0
+python-troveclient==2.2.0
 pytz==2018.3
 PyYAML==3.12
-redis==2.10.6
-reno==2.7.0
+redis==2.10.0
+reno==2.5.0
 repoze.lru==0.7
 requests==2.18.4
 requestsexceptions==1.4.0
 restructuredtext-lint==1.1.3
 rfc3986==1.1.0
-Routes==2.4.1
+Routes==2.3.1
 simplejson==3.13.2
-six==1.11.0
+six==1.10.0
 smmap2==2.0.3
 snowballstemmer==1.2.1
-Sphinx==1.6.5
+Sphinx==1.6.2
 sphinxcontrib-websupport==1.0.1
-SQLAlchemy==1.2.5
 sqlalchemy-migrate==0.11.0
+SQLAlchemy==1.0.10
 sqlparse==0.2.4
 statsd==3.2.2
 stestr==2.0.0
-stevedore==1.28.0
+stevedore==1.20.0
 Tempita==0.5.2
 tenacity==4.9.0
 termcolor==1.1.0
-testrepository==0.0.20
+testrepository==0.0.18
 testresources==2.0.1
 testscenarios==0.5.0
-testtools==2.3.0
+testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0
 urllib3==1.22
@@ -164,8 +165,8 @@ vine==1.1.4
 voluptuous==0.11.1
 waitress==1.1.0
 warlock==1.3.0
-WebOb==1.7.4
-WebTest==2.0.29
+WebOb==1.7.1
+WebTest==2.0.27
 wrapt==1.10.11
-wsgi-intercept==1.6.0
-xmltodict==0.11.0
+wsgi-intercept==1.4.1
+xmltodict==0.10.1
diff --git a/requirements.txt b/requirements.txt
index ed5dae2f05..16867cd1cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
-eventlet!=0.18.3,!=0.20.1,<0.21.0,>=0.18.2 # MIT
+eventlet!=0.18.3,!=0.20.1,>=0.18.2 # MIT
 keystonemiddleware>=4.17.0 # Apache-2.0
 Routes>=2.3.1 # MIT
 WebOb>=1.7.1 # MIT